ALLOY STEEL EFW PIPES

Carbon and Alloy Steel Pipe Electric Fusion Welded for High Pressure Service at High Temperatures

Savoy Piping Inc is World Renowned Supplier of Alloy Steel EFW Pipes. Among the Largest Stockist & Stockholder of Alloy Steel EFW Pipes in India. Leading Exporter of Alloy Steel EFW Pipes in Integrated Partnership with Top Alloy Steel EFW Pipes Manufacturers. Genuine Dealer of Alloy Steel EFW Pipes in USA, European and Japanese Origins. We are the Prominent Trusted Source for Alloy Steel EFW Pipes to be used in World Class Projects. We are the Top EPC Contractor's First Choice for Alloy Steel EFW Pipes with Large Ready Stock Inventory above 20000 Metric Tons.

Alloy steel is steel that is alloyed with a variety of elements in total amounts between 1.0% and 50% by weight to improve its mechanical properties. Alloy steels are broken down into two groups: low-alloy steels and high-alloy steels. The difference between the two is somewhat arbitrary: Smith and Hashemi define the difference at 4.0%, while Degarmo, et al., define it at 8.0%.[1][2] Most commonly, the phrase "alloy steel" refers to low-alloy steels.

Strictly speaking, every steel is an alloy, but not all steels are called "alloy steels". The simplest steels are iron (Fe) alloyed with carbon (C) (about 0.1% to 1%, depending on type). However, the term "alloy steel" is the standard term referring to steels with other alloying elements added deliberately in addition to the carbon. Common alloyants include manganese (the most common one), Nickel, Chromium, Molybdenum, Vanadium, Silicon, and Boron. Less common alloyants include aluminum, cobalt, copper, cerium, niobium, titanium, tungsten, tin, zinc, lead and zirconium.

The following is a range of improved properties in alloy steels (as compared to carbon steels): strength, hardness, toughness, wear resistance, corrosion resistance, hardenability, and hot hardness. To achieve some of these improved properties the metal may require heat treating.

Carbon and Alloy Steel Pipe Electric Fusion Welded for High Pressure Service at High Temperatures

This specification covers steel pipe, electric-fusion-welded with filler metal added, fabricated from pressure-vessel quality plate of any of service analyses and strength levels and suitable for high-pressure service at moderate temperatures. Heat treatment may or may not be required to attain the desired properties or to comply with applicable code requirements. Supplementary requirements are provided for use when additional testing or examination is desired.

The specification nominally covers pipe 16 in. (405 mm) in outside diameter or larger with wall thicknesses up to 3 in. (75 mm), inclusive. Pipe having other dimensions may be furnished provided it complies with all other requirements of this specification.

Several grades and classes of pipe are provided. Grade designates the type of plate used.

class designates the type of heat treatment performed during manufacture of the pipe, whether the weld is radiographically examined, and whether the pipe has been pressure tested as listed

Savoy Piping Inc. stocks a full range of the following A691 / SA691 pipe grades.

ASTM A691 PIPES CLASS DESIGNATION

Class

Heat Treatment on Pipe

Radiography, see Section

Pressure Test, see:

A691 / SA691 EFW Pipe Class 10

none

none

none

A691 / SA691 EFW Pipe Class 11

none

9

none

A691 / SA691 EFW Pipe Class 12

none

9

8.3

A691 / SA691 EFW Pipe Class 13

none

none

8.3

A691 / SA691 EFW Pipe Class 20

stress relieved, see 5.3.1

none

none

A691 / SA691 EFW Pipe Class 21

stress relieved, see 5.3.1

9

none

A691 / SA691 EFW Pipe Class 22

stress relieved, see 5.3.1

9

8.3

A691 / SA691 EFW Pipe Class 23

stress relieved, see 5.3.1

none

8.3

A691 / SA691 EFW Pipe Class 30

normalized, see 5.3.2

none

none

A691 / SA691 EFW Pipe Class 31

normalized, see 5.3.2

9

none

A691 / SA691 EFW Pipe Class 32

normalized, see 5.3.2

9

8.3

A691 / SA691 EFW Pipe Class 33

normalized, see 5.3.2

none

8.3

A691 / SA691 EFW Pipe Class 40

normalized and tempered, see 5.3.3

none

none

A691 / SA691 EFW Pipe Class 41

normalized and tempered, see 5.3.3

9

none

A691 / SA691 EFW Pipe Class 42

normalized and tempered, see 5.3.3

9

8.3

A691 / SA691 EFW Pipe Class 43

normalized and tempered, see 5.3.3

none

8.3

ASTM A691 PLATE MATERIAL

Pipe Grade

Type of Steel

ASTM Specification

HB, max A

Number

Grade

CM-65

carbon-molybdenum steel

A 204/ A204M

A

201

CM-70

carbon-molybdenum steel

A 204/ A204M

B

201

CM-75

carbon-molybdenum steel

A 204/ A204M

C

201

CMSH-70

carbon-manganese-silicon steel, normalized

A 537/A 537M

1

CMS-75

carbon-manganese-silicon steel

A 299/A 299M

…

…

CMSH-80

carbon-manganese-silicon steel, quenched and tempered

A 537/A 537M

2

1/2 CR

1/2 % chromium, 1/2 % molybdenum steel

A 387/ A 387M

2

201

1CR

1 % chromium, 1/2 % molybdenum steel

A 387/ A 387M

12

201

1-1/4 CR

1-1/4 % chromium, 1/2 % molybdenum steel

A 387/ A 387M

11

201

2-1/4 CR

2-1/2 % chromium, 1 % molybdenum steel

A 387/ A 387M

22

201

3CR

3 % chromium, 1 % molybdenum steel

A 387/ A 387M

21

201

5CR

5 % chromium, 1/2 % molybdenum steel

A 387/ A 387M

5

225

9CR

9 % chromium, 1 % molybdenum steel

A 387/ A 387M

9

241

91

91 % chromium, 1 % molybdenum steel

A 387/ A 387M

91

241

ASTM A691 aloy steel efw pipe heat treatment parameters

Pipe Grade

ASTM Specification

Post-Weld Heat-Treat Temperature Range (Strees Relieving), F ( C )

Normalizing Temperature, max unless otherwise noted, F ( C )

Quenching Temperature, max unless otherwise noted, F ( C )

Tempering Temperature, min, F ( C )

CM-65

A204/ A204M

1100 to 1200 (590 to 650)

1700 (925)

…

…

CM-70

A204/ A204M

1100 to 1200 (590 to 650)

1701 (925)

…

…

CM-75

A204/ A204M

1100 to 1200 (590 to 650)

1702 (925)

…

…

CMSH-70

A537/A 537M

1100 to 1200 (590 to 650)

1703 (925)

…

…

CMS-75

A 299/A 299M

1100 to 1200 (590 to 650)

1704 (925)

…

…

CMSH-80

A537/A 537M

1100 to 1200 (590 to 650)

A

1700 (925)

1100 to 1250 (590 to 675)

1/2 CR

A387 / A387M

1100 to 1300 (590 to 705)

180 (1010)

1700 (925)

1150 to 1375 (620 to 745)

1CR

A387 / A387M

1100 to 1350 (590 to 730)

181 (1010)

1700 (925)

1150 to 1375 (620 to 745)

1-1/4 CR

A387 / A387M

1100 to 1375 (590 to 745)

182 (1010)

1700 (925)

1150 to 1375 (620 to 745)

2-1/4 CR

A387 / A387M

1200 to 1400 (650 to 760)

183 (1010)

1700 (925)

1250 to1400 (675 to 760)

3CR

A387 / A387M

1200 to 1400 (650 to 760)

184 (1010)

1700 (925)

1250 to1400 (675 to 760)

5CR

A387 / A387M

1200 to 1400 (650 to 760)

185 (1010)

1700 (925)

1300 to 1400 (705 to 760)

9CR

A387 / A387M

1325 to 1375 (715 to 745)

B

…

1325 to 1375 (715 to 745)

91

A387 / A387M

1350 to 1420 (730 to 770)

1350 to 1420 (730 to 770)

1900 min (1040 min)

1350 to 1440 (730 to 780)

A Requires quenching and tempering
B 9 CR steel is an air-hardenable steel, at times retaining down to near atmospheric temperature. Good practice is to allow the steel to cool to 15 F or Lower before subjecting the steel to a tempering treatment or post-weld heat treatment.

Savoy Piping Inc. is a well known worldwide Exporter of Alloy Steel EFW Pipes, Savoy Piping Inc. is committed to provide each and every customer with the highest standard of customer service. We deals in Alloy Steel EFW Pipe in India and Overseas, offering a wide range of Alloy Steel EFW Pipes.